Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db4f8b77b988aad…

MALICIOUS

PDF

76.2 KB Created: 2021-09-12 17:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 8adea07a54d685d8d136502d0a9d6c0f SHA-1: cc684cb0601ae79069740df994dbde75a69da591 SHA-256: 9db4f8b77b988aadc69a5a8b9341c961f364a9f473a4a2934c4f9ce1ee02a2c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=bangladeshi+bangla+newspaper+online PDF link annotation
    • https://siam-royal-view.ru/data/files/gadorajofujogisak.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/2295517e331a56e89a84c182e8ad4bfd/dozanowafosobux.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/tanejotepe.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/12401715196.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/totiribonaxutawi.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/80625818239.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210907211046.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/77453419946.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/70670209248.pdfIn PDF document text
    • http://tyextractor.com/d/files/vimetepizuwobexetog.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/99464902985.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/20203024277.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/20123231383.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/nulemero.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/watubawomifew.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/89326858000.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/94179709242.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/30124320797.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613602e228a9c---77073419040.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/kujameredimipunipamafab.pdfIn PDF document text
    • http://agro-partner.com/Image/files/14721491000.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/moderogogodekilebenovu.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/13011565852.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/7405941743.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EC 18024 bytes
SHA-256: f1dc395f5c81d82462d1c3a1960c5e4049c05d090b8ecfff58bcef4d22c3e341
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 10852 bytes
SHA-256: bc93bd614297a9c0710905febb53a34f2bb6df268132fd6d3131dfb804cfac11

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